This is a little bit of a silly sentiment. Not everyone wants to use emacs as their daily planner, esp. since it doesn't come with cross-platform syncing or modern GUI out of the box. It would be like saying "It's slightly amusing how often people reinvent the Model T" every time a new car was announced.
As for now it runs in the browser (Sass version would be my demo: https://nuage.kerjean.me/ but you can host it anywhere else (even AWS Lammbda)). I never though about making it native to macOS, Linux or Windows as emacs is already available on those platform and pretty much superior but it can be done with electron.
I’m actually using it with “beorg” (iOS) and find it to be incredibly useful (and cross-platform). I use it for notes, outlines of lectures etc as well as managing my calendar.
Locking yourself into another proprietary tool is something you (eventually) learn is a bad idea.
I guess the point was that it's still not the same thing. Sure you can do a whole lot of things with emacs if you configure it properly, but configuring everything to work together takes much more time than a complete feature set that is already included.
